package com.ruoyi.project.common;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.RuoYiConfig;
import com.ruoyi.framework.config.ServerConfig;
import com.ruoyi.framework.web.controller.BaseController;
import com.ruoyi.framework.web.domain.R;
import com.ruoyi.project.system.domain.vo.UploadFileVo;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;

/**
 * 通用请求处理
 * 
 * @author ruoyi
 */
@Api(tags="通用请求处理：上传，下载")
@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController extends BaseController
{
    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";

    /**
     * 通用下载请求
     * 
     * @param fileName 文件名称
     * @param delete 是否删除
     */
    @ApiOperation("通用下载请求")
    @ApiImplicitParams({
        @ApiImplicitParam(name = "fileName", value = "文件名称", dataType = "String", dataTypeClass = String.class),
        @ApiImplicitParam(name = "delete", value = "是否删除", dataType = "Boolean", dataTypeClass = Boolean.class)
    })
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request)
    {
        try
        {
            if (!FileUtils.checkAllowDownload(fileName))
            {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete)
            {
                FileUtils.deleteFile(filePath);
            }
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @ApiOperation("通用上传请求（单个）")
    @ApiImplicitParam(name = "file", value = "文件", dataType = "MultipartFile", dataTypeClass = MultipartFile.class)
    @PostMapping("/upload")
    public R<UploadFileVo> uploadFile(MultipartFile file) throws Exception
    {
        try
        {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            UploadFileVo vo = new UploadFileVo();
            vo.setUrl(url);
            vo.setFileName(fileName);
            vo.setNewFileName(FileUtils.getName(fileName));
            vo.setOriginalFilename(file.getOriginalFilename());
            return success(vo);
        }
        catch (Exception e)
        {
            return error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @ApiOperation("通用上传请求（多个）")
    @ApiImplicitParam(name = "files", value = "文件数组", dataType = "List<MultipartFile>", dataTypeClass = List.class)
    @PostMapping("/uploads")
    public R<UploadFileVo> uploadFiles(List<MultipartFile> files) throws Exception
    {
        try
        {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files)
            {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            UploadFileVo vo = new UploadFileVo();
            vo.setUrls(StringUtils.join(urls, FILE_DELIMETER));
            vo.setFileNames(StringUtils.join(fileNames, FILE_DELIMETER));
            vo.setNewFileNames(StringUtils.join(newFileNames, FILE_DELIMETER));
            vo.setOriginalFilenames(StringUtils.join(originalFilenames, FILE_DELIMETER));
            return success(vo);
        }
        catch (Exception e)
        {
            return error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @ApiOperation("本地资源通用下载")
    @ApiImplicitParam(name = "resource", value = "资源路径", dataType = "String", dataTypeClass = String.class)
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception
    {
        try
        {
            if (!FileUtils.checkAllowDownload(resource))
            {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }
    
    /**
     * 自定义 Minio 服务器上传请求
     */
    @ApiOperation("自定义 Minio 服务器上传请求")
    @ApiImplicitParam(name = "file", value = "文件", dataType = "MultipartFile", dataTypeClass = MultipartFile.class)
    @PostMapping("/uploadMinio")
    public R<UploadFileVo> uploadFileMinio(MultipartFile file) throws Exception
    {
    	try
    	{
    		// 上传并返回新文件名称
    		String fileName = FileUploadUtils.uploadMinio(file);
    		UploadFileVo vo = new UploadFileVo();
    		vo.setUrl(fileName);
    		vo.setFileName(fileName);
    		vo.setNewFileName(FileUtils.getName(fileName));
    		vo.setOriginalFilename(file.getOriginalFilename());
    		return success(vo);
    	}
    	catch (Exception e)
    	{
    		return error(e.getMessage());
    	}
    }
}
